Biometrics (or biometric authentication) refers to the identification of humans by their characteristics or traits. Biometrics technology is used as a form of identification and access control. It is also used to identify individuals in groups that are under surveillance, by the use of thumbprint, iris, digital picture and facial recognition techniques.

Authentication by biometric verification is becoming increasingly common in corporate and public security systems, universities, consumer electronics and point of sale (POS) applications. In addition to security, the driving force behind biometric verification has been convenience.